Expandable laminoplasty implant

An implant comprising:

• a main housing comprising:
• an outer housing;
• an inner housing slidably receivable by the outer housing and comprising a gear rack;
• a gear disposed in the main housing and engageable with the gear rack of the inner housing to adjust the length of the main housing, the gear defining an aperture configured to accept a tool to translate rotational movement into linear motion, the inner housing having a first end receivable by a second end of the outer housing and slidably extendable through the outer housing until reaching an abutment wall at the second end of the outer housing to prevent further longitudinal movement of the inner housing;
• a lock slidably disposed in the main housing sized and configured to fix the length of the main housing when the desired length is achieved by slidable translation of the inner housing in the outer housing;
• a laminar shelf portion hingedly connected to a second end of the main housing, having a top portion, a side portion and a bottom portion sized and configured to be disposed against a lamina of a patient, the top portion defining bone screw holes extending therethrough;
• and
• a lateral mass connection portion hingedly connected to a first end of the main housing, having a top side and a bottom side and a bone screw hole extending therethrough, the bottom side sized and configured to be disposed against a lateral mass of a vertebrae of the patient.